JPH0516855B2 - - Google Patents
Info
- Publication number
- JPH0516855B2 JPH0516855B2 JP7793086A JP7793086A JPH0516855B2 JP H0516855 B2 JPH0516855 B2 JP H0516855B2 JP 7793086 A JP7793086 A JP 7793086A JP 7793086 A JP7793086 A JP 7793086A JP H0516855 B2 JPH0516855 B2 JP H0516855B2
- Authority
- JP
- Japan
- Prior art keywords
- brazing material
- container
- exhaust port
- brazing
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005219 brazing Methods 0.000 claims description 67
- 239000000463 material Substances 0.000 claims description 52
- 239000002184 metal Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 description 11
- 239000000945 filler Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 239000000155 melt Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Thermally Insulated Containers For Foods (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は金属製魔法瓶の製造方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for manufacturing a metal thermos flask.
（従来の技術）
従来、金属製魔法瓶の製造法として、内側容器
と外側容器とで二重壁構造の容器を形成し、これ
を真空加熱炉にいれ、二重容器を排気処理して両
容器間の空間を真空にした後、ロウ材で蓋を接合
して排気口を閉塞する方法が、例えば、特開昭57
−96622号明細書や特開昭58−192516号明細書に
て提案されている。しかしながら、ロウ材で排気
口と蓋との間に〓間を持たせて排気処理する従来
の方法では、ロウ材で蓋を支持するため多数のロ
ウ材を装着しなければならず、作業が繁雑であ
る。しかも、ロウ材の融解開始時にロウ材から発
生するガスが容器の二重壁間の空間内に流入する
恐れがあり、ガス流入による魔法瓶の真空度の低
下を防止するには多量のゲツターが必要となる。
また、排気口と蓋間の〓間を大きくできないため
排気抵抗が大きく、排気効率が劣るという問題が
ある。(Prior art) Conventionally, as a manufacturing method for metal thermos flasks, a container with a double wall structure is formed by an inner container and an outer container, which is placed in a vacuum heating furnace, and the double container is evacuated to separate both containers. For example, in Japanese Patent Application Laid-open No. 57, a method of creating a vacuum in the space between them and then joining a lid with brazing material to close the exhaust port is known.
This has been proposed in the specification of No.-96622 and the specification of JP-A-58-192516. However, in the conventional method of exhaust treatment by leaving a gap between the exhaust port and the lid using brazing metal, it is necessary to attach a large number of brazing materials to support the lid, making the work complicated. It is. Moreover, there is a risk that the gas generated from the wax metal will flow into the space between the double walls of the container when the wax metal begins to melt, and a large amount of getter is required to prevent the vacuum level of the thermos flask from decreasing due to the inflow of gas. becomes.
Furthermore, since the gap between the exhaust port and the lid cannot be made large, there is a problem that the exhaust resistance is large and the exhaust efficiency is poor.
この問題を解決するため、本発明者は、特開昭
61−11012号明細書にて、閉塞部とロウ材支持部
とを屈曲させて一体に形成した閉塞板を用い、ロ
ウ材熔融前はロウ材の重さにより閉塞部を排気口
から離した状態に維持し、ロウ材熔融時にシーソ
ーの原理により閉塞板を回転させ排気口を閉塞部
で閉鎖すると共に、ロウ材で排気口近傍の容器壁
と閉塞部との間を封止させるようにした方法を提
案した。この方法は、ロウ材の取付作業が簡単
で、しかも、排気処理時に十分な排気用通路面積
を確保でき、ロウ材の融解開始時にロウ材から発
生する吸蔵ガスが真空空間に流入することがない
ため、ゲツターの使用量を低減できるという利点
を有している。 In order to solve this problem, the inventors of the present invention
In the specification of No. 61-11012, a blocking plate is used in which the blocking part and the brazing material support part are bent and integrally formed, and the blocking part is separated from the exhaust port due to the weight of the brazing material before melting the brazing material. , and when the brazing material is melted, the closing plate is rotated using the see-saw principle to close the exhaust port at the blocking section, and the brazing material is used to seal between the container wall near the exhaust port and the blocking section. proposed. This method simplifies the installation work of the brazing material, and also ensures a sufficient exhaust passage area during the exhaust process, preventing the occluded gas generated from the brazing material from flowing into the vacuum space when the brazing material starts melting. Therefore, it has the advantage that the amount of getter used can be reduced.
（考案が解決しようとする問題点）
しかしながら、前記方法は、真空加熱炉に倒立
させた二重容器の底部に閉塞板を載せただけで装
填するため、装填する過程で閉塞板が位置ズレ
し、封止時に排気口が完全に閉塞されず、製品の
歩どまりが悪くなる恐れがあり、またロウ材を載
せるロウ材支持部の形状が複雑であるなどの問題
があつた。(Problem to be solved by the invention) However, in the above method, loading is carried out by simply placing the closing plate on the bottom of the double container which is placed upside down in the vacuum heating furnace, so the position of the closing plate may shift during the loading process. There were other problems, such as the exhaust port not being completely closed during sealing, which may result in poor product yield, and the shape of the brazing material support on which the brazing material is placed being complicated.
（問題点を解決するための手段）
本発明は、前記問題を解決するため、金属製の
内側容器と外側容器とからなる二重壁構造を有
し、両容器間に形成される空間を真空断熱してな
る金属製魔法瓶の製造方法において、排気口を有
する外側容器と内側容器とからなる二重壁構造の
容器を形成する一方、前記外側容器の排気口の開
口面積より大きな面積を有する閉塞部と、該閉塞
部の表面に対し所定角度で屈曲させて一体的に形
成されたロウ材支持部とから成る閉塞板を用意
し、該閉塞板のロウ材支持部の表面にロウ材を装
着すると共に、ロウ材支持部の裏側表面を外側容
器の排気口の近傍の表面に接着剤で固定した後、
真空加熱炉に装填し、ロウ材の融点以下の温度で
真空排気処理した後、そのままの状態でロウ材を
加熱熔融させることにより排気口を封止するよう
にしたものである。(Means for Solving the Problems) In order to solve the above problems, the present invention has a double wall structure consisting of an inner container and an outer container made of metal, and the space formed between the two containers is vacuum-evacuated. In a method for manufacturing an insulated metal thermos flask, a container having a double-walled structure consisting of an outer container and an inner container having an exhaust port is formed, and a blockage having an area larger than the opening area of the exhaust port of the outer container is formed. and a brazing metal support portion that is integrally formed by being bent at a predetermined angle with respect to the surface of the blocking portion, and a brazing metal is attached to the surface of the brazing metal support portion of the blocking plate. At the same time, after fixing the back surface of the brazing material support to the surface near the exhaust port of the outer container with adhesive,
After being loaded into a vacuum heating furnace and evacuated at a temperature below the melting point of the brazing material, the brazing material is heated and melted in that state, thereby sealing the exhaust port.
（作用）
即ち、本発明は、閉塞部とロウ材支持部とを屈
曲させて一体に形成した閉塞板のロウ材支持部の
表面、例えば、表側表面にロウ材を装填すると共
に、ロウ材支持部の裏側表面、前記の場合、ロウ
材と反対側の面を外側容器の排気口近傍に接着す
ることによつて、真空炉への装填時、閉塞板やロ
ウ材の位置ズレを防止している。(Function) That is, in the present invention, the brazing material is loaded onto the surface of the brazing material supporting portion of the blocking plate, for example, the front surface, which is integrally formed by bending the blocking portion and the brazing material supporting portion. By gluing the back surface of the container (in the above case, the surface opposite to the brazing material) near the exhaust port of the outer container, the position of the closing plate and the brazing material can be prevented from shifting when loading into the vacuum furnace. There is.
また、閉塞板のロウ材支持部を外側容器に接着
することによつて、ロウ材支持部がロウ材を排気
口から離れた所に位置させ、しかも閉塞部がロウ
材と排気口との間を遮蔽する役割を果たすため、
融解時にロウ材が放出するガスが外側容器と内側
容器との間の空間に流入するのが防止される。さ
らに、ロウ材支持部の上に装着されたロウ材が融
解してロウ材支持部の下側に流れ落ちると、閉塞
部側の重さがロウ材支持部側よりも重いため、重
力の作用により接続部を支点として閉塞板が回転
し、その閉塞部が排気口を閉塞し、また閉塞部と
外側容器表面との間に毛管現象により融解したロ
ウ材が流れ込み、凝固すると気密的に封止するこ
とになる。 Furthermore, by adhering the brazing material support portion of the blocking plate to the outer container, the brazing material supporting portion can position the brazing material away from the exhaust port, and the blocking portion can be placed between the brazing material and the exhaust port. In order to play a role in shielding
Gases released by the brazing material during melting are prevented from flowing into the space between the outer container and the inner container. Furthermore, when the brazing filler metal mounted on the brazing filler metal support melts and flows down to the bottom of the brazing filler metal support, the blockage side is heavier than the brazing filler metal support, so gravity causes The closing plate rotates using the connecting part as a fulcrum, and the closing part closes the exhaust port, and the melted brazing material flows by capillary action between the closing part and the surface of the outer container, and when it solidifies, it is airtightly sealed. It turns out.
（実施例）
本発明方法による金属製魔法瓶の製造過程を示
す第１図及び第２図において、１は二重壁構造を
有する容器で、内側容器２と外側容器３とからな
り、両容器はそれらの口部４のところで溶接その
他の手段により接合され一体化してある。外側容
器の底部３ａには凹所５が形成され、該凹所５に
は真空処理するための排気口６が形成されてい
る。(Example) In FIGS. 1 and 2 showing the manufacturing process of a metal thermos flask by the method of the present invention, 1 is a container having a double wall structure, consisting of an inner container 2 and an outer container 3, both of which are They are joined and integrated at their mouth portions 4 by welding or other means. A recess 5 is formed in the bottom 3a of the outer container, and an exhaust port 6 for vacuum processing is formed in the recess 5.
閉塞板７は、第２図に示されるように、排気口
６を閉塞するのに十分な寸法のほぼ半円形の閉塞
部７ａと、該閉塞部と一体的に形成されたロウ材
支持部７ｂとで構成され、ロウ材支持部７ｂは閉
塞部表面に対してある角度で屈曲させてあり、そ
の表側表面上にロウ材８が装着されている。ま
た、閉塞部７ａとロウ材支持部７ｂとの接続部７
ｃは、排気口を封止した後、容易に除去できるよ
うに可及的に寸法を小さくしてある。 As shown in FIG. 2, the closing plate 7 includes a substantially semicircular closing portion 7a having a size sufficient to close the exhaust port 6, and a brazing material support portion 7b integrally formed with the closing portion. The brazing material support portion 7b is bent at a certain angle with respect to the surface of the closed portion, and the brazing material 8 is mounted on the front surface thereof. Also, the connecting portion 7 between the closing portion 7a and the brazing material support portion 7b
c is made as small as possible so that it can be easily removed after sealing the exhaust port.
前記構成の閉塞板７を用いて二重壁容器の真空
排気処理を行なう場合、まず第１図ａに示すよう
に二重壁構造の容器１を倒立させ、その底部３ａ
に設けた凹所５に閉塞板７を配置すると共に、そ
のロウ材支持部７ｂを接着材で凹所５の表面５ａ
に接着し、閉塞板７を排気口６の近傍に固定す
る。次に、この二重容器を倒立させたまま真空加
熱炉内部に装填し、加熱排気しながらロウ材８の
融点以下の温度、例えば、400℃で10-2〜10-4
Torrの真空度にまで排気し、内側容器２と外側
容器３との間の空間１０を真空化する。 When vacuum evacuation processing is performed on a double-walled container using the closing plate 7 having the above structure, first, as shown in FIG.
The closing plate 7 is placed in the recess 5 provided in the recess 5, and the brazing material support portion 7b is attached to the surface 5a of the recess 5 with an adhesive.
and fix the closing plate 7 near the exhaust port 6. Next, this double container is placed upside down in a vacuum heating furnace, and heated and evacuated at a temperature below the melting point of the brazing material 8, for example, 400°C, at 10 -2 to 10 -4
The vacuum is evacuated to Torr, and the space 10 between the inner container 2 and the outer container 3 is evacuated.
この時、閉塞板７を外側容器３の底部に接着し
ていた接着剤は分解して消失するが、ロウ材支持
部７ｂにロウ材８が接着されているため、ロウ材
の重さで、第１図ａに示す状態に維持される。 At this time, the adhesive that bonded the closing plate 7 to the bottom of the outer container 3 decomposes and disappears, but since the brazing material 8 is bonded to the brazing material support portion 7b, the weight of the brazing material The state shown in FIG. 1a is maintained.
真空排気処理した後、そのままの状態で、高周
波加熱あるいはふく射加熱等によりロウ材８の近
傍をロウ材８の融点以上の温度まで加熱する。ロ
ウ材８はその融点以上の温度に加熱されると、融
解してロウ材支持部７ｂ下側に流化するため、ロ
ウ材支持部７ｂ側が閉塞部側より軽くなり、閉塞
板７はその接続部７ｃを支点として第１図ａに矢
印イで示す反時計回りに回転し、第１図ｂに示す
状態となる。これにより、融解したロウ材８が、
毛管現象により閉塞部７ａと凹所表面との間に入
り込み、閉塞板７と外側容器３とがロウ付けされ
る。その後、真空炉内で冷却すると、ロウ材の凝
固により外側容器の排気口が閉塞板７により封止
される。 After the evacuation process, the vicinity of the brazing material 8 is heated to a temperature equal to or higher than the melting point of the brazing material 8 by high-frequency heating, radiation heating, or the like. When the brazing filler metal 8 is heated to a temperature higher than its melting point, it melts and flows below the brazing filler metal support portion 7b, so the brazing filler metal support portion 7b side becomes lighter than the closing portion side, and the closing plate 7 It rotates counterclockwise, as shown by arrow A in FIG. 1a, about part 7c as a fulcrum, and enters the state shown in FIG. 1b. As a result, the melted brazing material 8
It enters between the closing portion 7a and the surface of the recess due to capillary action, and the closing plate 7 and the outer container 3 are brazed together. Thereafter, when it is cooled in a vacuum furnace, the exhaust port of the outer container is sealed by the closing plate 7 due to solidification of the brazing material.
このようにして得た真空断熱二重容器を真空加
熱炉から取り出し、真空排気処理後は不要となる
ロウ材支持部を、切除するか、又は外側容器表面
に密着させるべく押しつけるようにする。 The thus obtained vacuum insulated double container is taken out of the vacuum heating furnace, and the brazing material supporting portion, which is unnecessary after the vacuum evacuation process, is cut off or pressed so as to be brought into close contact with the surface of the outer container.
なお、前記実施例では、外側容器の底部、具体
的には、排気口６を形成する部位を二重壁容器の
内側へ若干へこませ、排気口６の周囲の面５ａが
他の面より深くなるように凹所５を形成している
が、必ずしも凹所５を設ける必要は無く、底部表
面を平坦にしておいても良い。 In the above embodiment, the bottom of the outer container, specifically, the part forming the exhaust port 6, is slightly recessed into the inside of the double-walled container, so that the surface 5a around the exhaust port 6 is lower than the other surface. Although the recess 5 is formed to be deep, it is not necessarily necessary to provide the recess 5, and the bottom surface may be made flat.
また、半円形の閉塞部７ａを有する閉塞板７を
使用しているが、必ずしもこの形状にする必要は
なく、任意の形状にすることができる。 Further, although the closing plate 7 having a semicircular closing portion 7a is used, it is not necessarily necessary to have this shape, and it can be any shape.
（発明の効果）
以上の説明から明らかなように、本発明によれ
ば、ロウ材を装着した閉塞板を二重容器の外側容
器に接着剤で接着した状態で真空加熱炉に装填す
るようにしているため、真空加熱炉に装填する
際、閉塞板の位置ズレを生じることがなく、従つ
て、真空排気処理後、確実に排気口を閉塞するこ
とができ、魔法瓶を歩どまり良く製造できる。(Effects of the Invention) As is clear from the above description, according to the present invention, the closing plate fitted with the brazing material is attached to the outer container of the double container with adhesive and then loaded into the vacuum heating furnace. Therefore, when loading the vacuum flask into the vacuum heating furnace, the position of the closing plate does not shift, and therefore, after the vacuum evacuation process, the exhaust port can be reliably closed, and the thermos flask can be manufactured with a good yield.
まか、ロウ材はロウ材支持部に１ケ所だけ装着
すればよく、しかも閉塞板自体も外側容器に接着
するだけで良いので、ロウ材を高精度に加工する
必要がなく、また、外側容器の排気口の近傍及び
閉塞板の形状を単純化できるだけでなく、作業が
著しく簡単である。 In addition, the brazing material only needs to be attached to the brazing material support in one place, and the closing plate itself only needs to be glued to the outer container, so there is no need to process the brazing material with high precision. Not only can the vicinity of the exhaust port and the shape of the closing plate be simplified, but the work is also extremely easy.
さらに、ロウ材が融解する場所が排気口から離
れた位置にすることが出来るので、融解直後に多
量に発生するロウ材の吸蔵ガスが内側容器と外側
容器との間の空間に流れ込むことがほとんど無
く、従つてゲツターの使用量を少なくでき、ゲツ
ターの選定が容易となる。 Furthermore, since the place where the brazing material melts can be located away from the exhaust port, a large amount of the gas stored in the brazing material that is generated immediately after melting almost never flows into the space between the inner and outer containers. Therefore, the amount of getter used can be reduced, and getter selection becomes easy.
また、真空排気処理した後、ロウ材支持部を切
断することにより、魔法瓶の全高を小さくできる
など優れた効果が得られる。 Further, by cutting the brazing material support portion after evacuation treatment, excellent effects such as reducing the overall height of the thermos flask can be obtained.
第１図は本発明方法に係る金属製魔法瓶の製造
過程を示す断面図、第２図は金属製魔法瓶の要部
分解斜視図である。
１……二重壁構造容器、２……内側容器、３…
…外側容器、４……口部、５……凹所、６……排
気口、７……閉塞板、７ａ……閉塞部、７ｂ……
ロウ材支持部、７ｃ……接続部、８……ロウ材、
１０……空間。
FIG. 1 is a sectional view showing the manufacturing process of a metal thermos flask according to the method of the present invention, and FIG. 2 is an exploded perspective view of the main parts of the metal thermos flask. 1...Double wall structure container, 2...Inner container, 3...
...Outer container, 4... Mouth, 5... Recess, 6... Exhaust port, 7... Closure plate, 7a... Closure part, 7b...
Brazing material support part, 7c... Connection part, 8... Brazing material,
10...Space.
Claims (1)
壁構造を有し、両容器間に形成される空間を真空
断熱してなる金属製魔法瓶の製造方法において、
排気口を有する外側容器と内側容器とからなる二
重壁構造の容器を形成する一方、前記外側容器の
排気口の開口面積より大きな面積を有する閉塞部
と、該閉塞部の表面に対し所定角度で屈曲させて
一体的に形成されたロウ材支持部とから成る閉塞
板を用意し、該閉塞板のロウ材支持部の表面にロ
ウ材を装着すると共に、ロウ材支持部の裏側表面
を外側容器の排気口の近傍の表面に接着剤で固定
した後、真空加熱炉に装填し、ロウ材の融点以下
の温度で真空排気処理した後、そのままの状態で
ロウ材を加熱熔融させることにより排気口を封止
することを特徴とする金属製魔法瓶の製造方法。 ２ 閉塞部とロウ材支持部との接続部を可及的に
小寸法にしてなる閉塞板を用いる特許請求の範囲
第１項記載の方法。[Claims] 1. A method for manufacturing a metal thermos flask, which has a double-walled structure consisting of an inner metal container and an outer container, and vacuum insulates the space formed between the two containers,
A double-walled container is formed by an outer container having an exhaust port and an inner container, and a closed portion having an area larger than the opening area of the exhaust port of the outer container, and a predetermined angle with respect to the surface of the closed portion. A closing plate is prepared, which is made up of a brazing metal support part that is bent and integrally formed, and a brazing metal is attached to the surface of the brazing metal support part of the closing plate, and the back surface of the brazing metal support part is turned outward. After fixing the container to the surface near the exhaust port with adhesive, it is loaded into a vacuum heating furnace, vacuum pumped at a temperature below the melting point of the brazing material, and then evacuated by heating and melting the brazing material. A method for manufacturing a metal thermos flask characterized by a sealed mouth. 2. The method according to claim 1, in which a closing plate is used in which the connecting portion between the closing portion and the brazing material support portion is made as small as possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7793086A JPS62233121A (en) | 1986-04-03 | 1986-04-03 | Production of metal thermos |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7793086A JPS62233121A (en) | 1986-04-03 | 1986-04-03 | Production of metal thermos |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62233121A JPS62233121A (en) | 1987-10-13 |
| JPH0516855B2 true JPH0516855B2 (en) | 1993-03-05 |
Family
ID=13647802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7793086A Granted JPS62233121A (en) | 1986-04-03 | 1986-04-03 | Production of metal thermos |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62233121A (en) |
-
1986
- 1986-04-03 JP JP7793086A patent/JPS62233121A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62233121A (en) | 1987-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0497064B1 (en) | Method for making double-walled insulating metal container | |
| JPS6145710A (en) | Production of vaccum heat insulating cooking utensil | |
| WO2019007099A1 (en) | Novel method for manufacturing vacuum heat-insulating container, and vacuum heat-insulating container manufactured thereby | |
| JPH0516855B2 (en) | ||
| JP2774592B2 (en) | Manufacturing method of metal thermos | |
| JPH0414568B2 (en) | ||
| JP3093969B2 (en) | Manufacturing method of IC package | |
| JP2000201835A (en) | Tightly sealing method for metallic vacuum double container and tightly sealing structure therefor | |
| JP2845375B2 (en) | Manufacturing method of metal thermos | |
| JP3439626B2 (en) | Vacuum structure sealing method and its structure | |
| JP3267161B2 (en) | Metal vacuum double bottle | |
| JPH04276222A (en) | Synthetic resin vacuum insulation vessel and manufacture thereof | |
| JP2647870B2 (en) | Manufacturing method of metal thermos | |
| JPH0719402Y2 (en) | Metal thermos | |
| JPS60222017A (en) | Production of metal thermos | |
| JPH0238208B2 (en) | ||
| JP2774746B2 (en) | Manufacturing method of metal vacuum double container | |
| JPH03267023A (en) | Manufacture of metallic vacuum bottle | |
| JPS62142526A (en) | Production of metal vacuum heat insulating container | |
| JPS5931157Y2 (en) | metal thermos flask | |
| JPS5936529B2 (en) | How to manufacture metal thermos flasks | |
| JPS63206213A (en) | Production of metal double container | |
| JP2560217Y2 (en) | Metallic vacuum double container | |
| JPS6320128B2 (en) | ||
| JPS6373923A (en) | Production of metal vacuum double tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |